An oilfield located off the coast of north China resumed production on Wednesday after it was discovered to be leaking oil Tuesday morning, the China National Offshore Oil Corporation (CNOOC) said.

An oil slick in the Suizhong 36-1 oilfield, located in north China's Bohai Bay, has been cleaned up and an emergency alert for the region has been lifted, according to the CNOOC, China's largest offshore oil producer.

The oil spill occurred at about 1:30 a.m. Tuesday, when the centralized control system used to operate the oilfield's central platform broke down.

The oil giant has had to deal with three accidents over the last week, including two other oil spills in Bohai Bay and a fire in one of its refineries in south China's Guangdong Province.